Users in a branch need to establish virtual private dial-up network (VPDN) connections with the headquarters. Layer 2 Tunneling Protocol (L2TP) is deployed between the branch and the headquarters. The branch has no dial-up network, and its gateway functions as a Point-to-Point Protocol over Ethernet...

I'm currently using a dynamic DNS to accomplish this so external requests will hit a domain supplied by dynamic DNS and if the IP assigned to this domain goes down, I issue a command to update/switch the IP to the other interface. do you have a more elegant way of handling this?